Finding the Fourth Proportional to 156,433.30, 215,878.98 and 84,814.42

Step by Step Solution

1. Step 1: Write the proportion equation
   156,433.30 : 215,878.98 = 84,814.42 : x
2. Step 2: Convert to fraction form
   156,433.30/215,878.98 = 84,814.42/x
3. Step 3: Cross multiply
   156,433.30x = 215,878.98 × 84,814.42
4. Step 4: Simplify right side
   156,433.30x = 18,309,650,478.89
5. Step 5: Solve for x
   x = 18,309,650,478.89/156,433.30
6. Step 6: Final answer
   x = 117,044.46